Quantum-dot Cellular Automata Based Superior Design of Conservative Reversible Parity Logic Circuits

Ali Majeed
2021 ◽  
Vol 11 (24) ◽  
pp. 12157
Mohsen Vahabi ◽  
Pavel Lyakhov ◽  
Ali Newaz Bahar ◽  
Khan A. Wahid

The miniaturization of electronic devices and the inefficiency of CMOS technology due to the development of integrated circuits and its lack of responsiveness at the nanoscale have led to the acquisition of nanoscale technologies. Among these technologies, quantum-dot cellular automata (QCA) is considered one of the possible replacements for CMOS technology because of its extraordinary advantages, such as higher speed, smaller area, and ultra-low power consumption. In arithmetic and comparative circuits, XOR logic is widely used. The construction of arithmetic logic circuits using AND, OR, and NOT logic gates has a higher design complexity. However, XOR gate design has a lower design complexity. Hence, the efficient and optimized XOR logic gate is very important. In this article, we proposed a new XOR gate based on cell-level methodology, with the expected output achieved by the influence of the cells on each other; this design method caused less delay. However, this design was implemented without the use of inverter gates and crossovers, as well as rotating cells. Using the proposed XOR gate, two new full adder (FA) circuits were designed. The simulation results indicate the advantage of the proposed designs compared with previous structures.

A much-required breakthrough in the field of VLSI took place with the birth of Quantum-dot cellular automata (QCA) technology, an impressive amalgamation of Quantum Physics and Nanotechnology and acted as a possible replacement to the age-old semiconductor transistor-based designs (CMOS) with Boolean paradigm. In this paper, we aim at implementing this technology to build a robust 8:1 multiplexer that can help in building and developing many more digital logic circuits, from an already proposed 2:1 multiplexer. It has excellent efficiency with respect to least cell count, latency, space and power dissipation.

2020 ◽  
Vol 14 (1) ◽  
pp. 88-92 ◽  
Feifei Deng ◽  
Guangjun Xie ◽  
Xin Cheng ◽  
Zhang Zhang ◽  
Yongqiang Zhang

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